Geoege eichaed hammond



(No Model.)

G. R. HAMMOND. MITERFRAMB CLAMP.

Patented Jan. 19, 1886.

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UNITED STATES PATENT OFFICE.

GEORGE RICHARD HAMMOND, OF SNODLAND, COUNTY OF KENT, ENGLAND.

MlTER-FRAME CLAMP.

SPECIFICATION forming part of Letters Patent No 334,435, dated January19, 1886.

Application filed June 2, 1885. Serial No. 167,390.

(No model.) Patented in England February 11, 1895, No. 1,893, and inCanada July 8, 1885, No. 22,031.

To all whom it may concern.-

Be it known that I, GEORGE RICHARD HAM- MOND, a subject of Her Majestythe Queen of Great Britain, residing at Snodland, in the county of Kent,England, have invented a new and useful Miter-Frame Cramp, (patented inGreat Britain, No. 1,893, dated February 11, 1885, and in Canada, No.22,031, July 8,1885,) of which the following is a specification.

My invention has for its object the production of a simple and efficientcramping device, by means of which the four square miters of any framecan be cramped at one time and by one operation.

vIn the drawings, Figure 1 is a plan of my improved cramp. Fig. 2is anend view showing portions of my improved cramp.

Like letters indicate like parts in both figures.

My improved cramp consists of a square threaded or other suitably-formedscrew, A. One half of the said screw isleft hand and the other halfright hand, with a central boss or head, A, between them, in which worksalever or handle, B. The said screw carries two nuts, Cone on eachendand adouble born, 0, is formed on each side of each of the said nuts0. A bar, E, of metal or other suitable material, is jointed to each ofthe said double horns O by a pin, 0, or other means, in such a manner asto admit of the said bar turning freely in the said horns,and of theadjustment of the said bar to any desired angle. A socket, F, is fittedto each of the said bars E, and slides freely thereon, the said socketsbeing secured at any desired positions on the said bars (according tothe size of the frame to be cramped) by means of pins G, fitting intoholes 9 in the said sockets, and holes e in the said bars, or

by other convenient means. On the upper side of each of the said socketsF is a small tapped stud or boss, f, upon which ismounted astop-piece,H. The said stop-piece is formed with a rectangular flange, H, whichcomes in contact with and cramps the corner of the frame. The saidflange H is formed with openings orslots H, to admit of the miters beingsecured by nails or brads while the frame is held in the cramp. The saidstop-piece H is retained upon the bossf of the socket F by means of thescrew K, which enters the stud or bossf, and upon whichscrewthestoppiece H has a swivel motion. The four portions of the framehaving been inserted between the stop-pieces H, the whole can be crampedtogether by turning the handle or lever B.

The parts of my improved cramp may be of any suitable material, and I donot limit myself to the precise details herein set forth, as the samemay be modified and varied without departing from my invention; but,

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is In a miter-frame cramp, the combination of the doublescrew A, having a right and left hand screw-thread out upon its ends,the boss and handle B between said screwthreaded ends, nuts upon each ofsaid screws, and horns projecting laterally from said nuts, with barspivoted to said horns, sliding sockets F, and

stop-pieces H upon said bars, substantially as and-for the purpose setforth.

GEORGE RICHARD HAMMOND. [It s] Vitnesses:

JOSHUA WILFORD, i J EssE PERRIN.

